SIST EN 13160-5:2004
(Main)Leak detection systems - Part 5: Tank gauge leak detection systems
Leak detection systems - Part 5: Tank gauge leak detection systems
This document specifies the requirements for leak detection systems - class IV for use only with liquids as defined in the scope of EN 13352.
Leckanzeigesysteme - Teil 5: Tankinhalts-Leckanzeigesysteme
Dieses Dokument legt Anforderungen an Leckanzeigesysteme - Klasse IV für den Einsatz mit nur den Flüssigkeiten fest, die im Anwendungsbereich von EN 13352 definiert worden sind.
Systemes de détection de fuites - Partie 5: Systemes de détection de fuites au moyen de jauges automatiques en citernes
Le présent document spécifie les exigences relatives aux systemes de détection de fuites de classe IV conçus pour une utilisation uniquement avec les liquides comme défini dans le domaine d'application de l'EN 13352.
Sistemi za kontrolo tesnosti - 5 del: Manometri na rezervoarjih kot sistem za zaznavanje tesnosti
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sistemi za kontrolo tesnosti - 5 del: Manometri na rezervoarjih kot sistem za zaznavanje tesnostiLeckanzeigesysteme - Teil 5: Tankinhalts-LeckanzeigesystemeSystemes de détection de fuites - Partie 5: Systemes de détection de fuites au moyen de jauges automatiques en citernesLeak detection systems - Part 5: Tank gauge leak detection systems23.040.99Drugi sestavni deli za cevovodeOther pipeline components23.020.10UH]HUYRDUMLStationary containers and tanksICS:Ta slovenski standard je istoveten z:EN 13160-5:2004SIST EN 13160-5:2004en01-november-2004SIST EN 13160-5:2004SLOVENSKI
STANDARD
SIST EN 13160-5:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13160-5September 2004ICS 23.020.10English versionLeak detection systems - Part 5: Tank gauge leak detectionsystemsSystèmes de détection de fuites - Partie 5: Systèmes dedétection de fuites au moyen de jauges automatiques enciternesLeckanzeigesysteme - Teil 5: Tankinhalts-LeckanzeigesystemeThis European Standard was approved by CEN on 9 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13160-5:2004: ESIST EN 13160-5:2004
EN 13160-5:2004 (E) 2 Contents page Foreword.4 1 Scope.5 2 Normative references.5 3 Terms, definitions and abbreviated terms.5 3.1 Terms and definitions.5 3.2 Abbreviations.6 4 General.6 5 Dynamic leak detection (category A).7 6 Statistical quiet period leak detection (category B (1)).7 7 Static tank gauge leak detection (category B (2)).7 8 Leak indicating device.7 9 Type testing procedure for leak detection systems using tank gauge data, categories A and B (1).8 9.1 Test objective.8 9.2 Test equipment.9 9.3 Test method.9 9.4 Test results analysis and report.14 9.5 Statistical analysis.14 10 Type testing procedure for tank gauge leak detection systems category B(2).19 10.1 Test objective.19 10.2 Evaluation.19 10.3 Test equipment.20 10.4 Test method.20 10.5 Test results.23 10.6 Statistical analysis.24 Annex A (normative)
Acquisition of field data to provide a standard database for testing software leak detection systems Categories A and B(1).26 A.1 Objective.26 A.2 Requirements.27 A.3 Equipment.28 A.4 Method.29 A.4.1 Preparation.29 A.4.2 Tank contents data recording.29 A.4.3 Delivery records.30 A.4.4 Data retrieva.30 A.4.5 Temperature of delivered product.30 A.4.6 Determination of delivery status.30 A.5 Data up-loading and verification.31 Bibliography.32
SIST EN 13160-5:2004
EN 13160-5:2004 (E) 3
Tables Table 1 — Performance requirements for categories of leak detection.7 Table 2 — Selection of data files according to tank capacity and shade temperature.10 Table 3 — Sequence of tests for leak detection categories A and B (1).13 Table 4 — Summary of results from qualitative evaluation.16 Table 5 — Sequence of tests for leak detection category B(2).23 Table A.A1 – Range of parameters.28
SIST EN 13160-5:2004
EN 13160-5:2004 (E) 4 Foreword This document (EN 13160-5:2004) has been prepared by Technical Committee CEN/TC 221 “Shop fabricated metallic tanks and equipment for storage tanks and for service stations”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. This European Standard consists of 7 parts. Leak detection systems; Part 1: General principles Part 2: Pressure and vacuum systems Part 3: Liquid systems for tanks Part 4: Liquid and/or vapour sensor systems for use in leakage containments or interstitial spaces Part 5: Tank gauge leak detection systems Part 6: Sensors in monitoring wells Part 7: General requirements and test methods for interstitial spaces, leak protecting linings and leak protecting jackets According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 5 1 Scope This document specifies the requirements for leak detection systems – class IV for use only with liquids as defined in the scope of EN 13352. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 228, Automotive fuels — Unleaded petrol — Requirements and test methods. EN 590, Automotive fuels — Diesel – Requirements and test methods. EN 976-1, Underground tanks of glass-reinforced plastics (GRP) — Horizontal cylindrical tanks for the non-pressure storage of liquid petroleum based fuels — Part 1: Requirements and test methods for single wall tanks. EN 12285-1, Workshop fabricated steel tanks — Part 1: Horizontal cylindrical single skin and double skin tanks for the underground storage of flammable and non-flammable
water polluting liquids. EN 13160-1:2003, Leak detection systems — Part 1: General principles. EN 13160-2, Leak detection systems — Part 2: Pressure and vacuum systems. EN 13160-3, Leak detection systems — Part 3: Liquid systems for tanks. EN 13160-4, Leak detection systems — Part 4: Liquid and/or vapour sensor systems for use in leakage containments or interstitial spaces. EN 13160-6, Leak detection systems — Part 6: Sensors in monitoring wells. EN 13352:2002, Specification for the performance of automatic tank contents gauges. EN 28601, Data elements and interchange formats — Information interchange — Representation of dates and times (ISO 8601:1988 and technical corrigendum 1:1991). 3 Terms, definitions and abbreviated terms For the purposes of this document, the terms and definitions given in EN 13160-1:2003 and the following apply. 3.1 Terms and definitions 3.1.1 quantitative output numerical indication of the leak rate estimated for a given test 3.1.2 qualitative output pass/fail indication for a given test with reference to a specified leak rate SIST EN 13160-5:2004
EN 13160-5:2004 (E) 6 3.2 Abbreviations B is the bias LL is the lower confidence bound for probability of detection UL is the upper confidence bound for probability of detection MSE is the mean squared error PD is the probability of detection PFA is the probability of false alarm PI(all) is the proportion of invalid records for all records PI(leak) is the proportion of invalid records for leaking tanks PI(tight) is the proportion of invalid records for tight tanks
R is the simulated leak rate C
is the criterion or threshold for indicating a leak B is the estimated bias of the system SD is the standard deviation tb is the two-sample t-test bias 4 General General principles shall be according to EN 13160-1. Tank gauge leak detection systems shall be divided into two categories of operation: Category A: Systems providing leak detection for tanks and pipes, connected with the tank; Category B: Systems providing leak detection for tanks only. The minimum operational performance requirements for each category are contained in Table 1. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 7 Table 1 — Performance requirements for categories of leak detection Category Leak rate l⋅⋅⋅⋅h−−−−1 Maximum time of detection 4,0 24 h 2,0 7 days A Dynamic leak detection 0,8 14 days 4,0 24 h 2,0 7 days B(1) Statistical quiet period detection 0,8 14 days B(2) Static leak detection 0,4 6 h
In addition to the performance requirements in terms of leak rates specified in Table 1 above, the tank gauge leak detection system shall be able to detect a large loss of 300 l or more in a maximum time of 30 min. Any gauge system to be used for any category of leak detection shall have water detection capability according to EN 13352. 5 Dynamic leak detection (category A) For this category, the system shall communicate with the metering system, associated with the withdrawal of product from the storage tank, in order to receive details of all volumes dispensed from the tank. At the specified leak rate according to Table 1, the system shall have a probability of detection of at least 95 % whilst a false alarm rate shall not exceed 5 %. 6 Statistical quiet period leak detection (category B (1)) For this category, the system shall be capable of detecting the specified leak rate according to Table 1 with a probability of at least 95 % whilst operating at a false alarm rate of 5 % or less. 7 Static tank gauge leak detection (category B (2)) For this classification, the system shall be capable, when no product is being dispensed from or delivered to the tank, of detecting the specified leak rate according to Table 1 with a probability of at least 95 % whilst operating at a false alarm rate of 5 % or less. 8 Leak indicating device A leak indicating device shall be provided. In addition for categories A and B, the requirements of a gauge control device as defined in EN 13352 shall be met. An alarm shall be activated whenever a leak rate is detected at the specified rate or above, in accordance with Table 1. Where performance in accordance with Table 1 is not achievable within the required levels of probability, the results shall be reported as inconclusive. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 8 9 Type testing procedure for leak detection systems using tank gauge data, categories A and B (1) 9.1 Test objective 9.1.1 The aim of the test is to assess the suitability of a software leak detection system which uses tank gauge data for detecting the loss of stored product from: In the case of Category A, a storage tank and/or draw-off pipework, or in the case of Category B(1), a storage tank. Tests are performed to determine: 9.1.1.1 that a leak rate of 4 l⋅h−1 is detected within 24 h with a probability of detection not less than 95 % and a probability of false alarms not greater than 5 %. 9.1.1.2 that a leak rate of 2 l⋅h−1 is detected within 7 days with a probability of detection not less than 95 % and a probability of false alarms not greater than 5 %. 9.1.1.3 that a leak rate of 0,8 l⋅h−1 is detected within 14 days with a probability of detection not less than 95 % and a probability of false alarms not greater than 5 %. In each case, tests are performed following an initialisation period equivalent to a maximum of 28 days operation, during which the system under test processes normal operational data without induced leaks. 9.1.2 Data from a pre-recorded standard test database collected in accordance with annex A will be submitted to the system under test covering the ranges shown for each of the following (per tank): 9.1.2.1 Daily shade temperature:
-5 °C to +30 °C; 9.1.2.2 Storage tank capacity:
10 000 l to 50 000 l; 9.1.2.3 Average daily throughput (per tank):
1 000 l to 12 000 l per day; 9.1.2.4 Delivery quantity per tank:
2 750 l to 9 500 l; 9.1.2.5 Delivery temperature:
-5 °C to +25 °C; 9.1.2.6 Delivery frequency:
2 to 7 per week; 9.1.2.7 Individual dispenser accuracy:
-0,3 % to +0,3 % of dispensed volume. 9.1.3 The system under test shall be qualified for use with database files representing at least one of 9.1.3.1 and 9.1.3.2 and, optionally, with 9.1.3.3, 9.1.3.4, 9.1.3.5 and/or 9.1.3.6: 9.1.3.1 Suction draw-off systems (where a hydraulic pumping device is incorporated into the dispenser); 9.1.3.2 Pressurised draw-off systems (where product is transferred from the tank to the dispenser by a remote pumping unit); 9.1.3.3 Blending dispenser systems (where product from two or more tanks is mixed at the dispenser); 9.1.3.4 Tank manifolding systems (where two or more tanks are connected together such that fuel may be drawn from the tanks independently); SIST EN 13160-5:2004
EN 13160-5:2004 (E) 9 9.1.3.5 Tank siphon systems (where two or more tanks are connected together such that fuel cannot be drawn from the tanks independently); 9.1.3.6
Multiple draw-off (minimum of 2 dispensers per tank, suction or pressure). 9.1.4 The system under test shall be qualified for use as a Category A or a Category B(1) leak detection system. 9.1.5 The system under test shall be qualified for use with data corresponding to each type of product in which it will detect leaks, such as unleaded gasoline according to EN 228, diesel fuel according to EN 590. 9.2 Test equipment 9.2.1 The following test equipment will be required: 9.2.1.1 A computer and associated data transfer peripherals. 9.2.1.2 Leak simulation and data analysis software, as necessary to process standard test database files in order to simulate leaks in the data as described in 9.3 and to submit data to the software of the tank gauge system under test 9.3 Test method 9.3.1 Objective The objective of the test schedule is to verify that the system under test will return leak test results in accordance with the criteria of 9.1.1 when data from the standard test database are processed by the leak detection software following modifications to simulate leaks at various rates. The manufacturer shall supply the system under test in the form of software loaded onto a computer which is capable of reading in and processing files from the standard test database. These files will be provided in a standard format (as defined in annex A) and shall be accepted without any pre-processing. The manufacturer shall state the initialisation period required for the system under test, which shall not exceed 28 days. 9.3.2 File sorting and selection A set of files shall be selected from the standard database, which includes data appropriate to those applications listed in 9.1.3, 9.1.4 and 9.1.5 for which the system under test is to be qualified. For each type of draw-off system and fuel, the files selected shall meet the following conditions: For each of the draw-off methods listed in 9.1.3, and each fuel listed in 9.1.5, between 25 % and 75 % of the data files selected should be taken from tanks where that type of draw-off system or fuel is in use. The same data file may cover two or more uses, for example a manifolded tank using pressurised draw-off via multiple dispensers. Leak detection systems to be tested will provide a quantitative or a qualitative output. A qualitative output will indicate a pass/fail result in accordance with Table 1. The minimum sample sizes for data files, which shall be collected for each of these types, are: 9.3.2.1 Systems with a Quantitative Output: ≥ 100 files (not more than 15 from the same tank); 9.3.2.2 Systems with a Qualitative Output: ≥ 240 files (not more than 36 from the same tank). SIST EN 13160-5:2004
EN 13160-5:2004 (E) 10 The database files shall be sorted to form an ordered data set which is divided into 5 equal groups according to the 20th, 40th, 60th and 80th percentiles of the recorded range of shade temperature. Each of the five groups shall be further divided into 3 equal sub-groups, according to the 33rd and 67th percentiles of the recorded range of tank sizes, such that sub-groupings are determined independently for each of the five groups. For systems with a quantitative output, three files shall be selected at random from each of the 15 sub-sets, to provide a sample of 45 files for subsequent evaluation. For systems with a qualitative output, eight files shall be selected at random from each of the 15 sub-sets, to provide a sample of 120 files for subsequent evaluation. For example, for data collected over the ranges of shade temperature and tank capacity as defined in 9.1.2.2 and 9.1.2.3 the files would be sorted as shown in table 2, and n files selected from each sub-set as shown, where n = 3 for a quantitative system and n = 8 for a qualitative system: Table 2 — Selection of data files according to tank capacity and shade temperature Shade Temperature Tank Capacity -5 °°°°C to 20th Percentile 20th to 40th Percentile 40th to 60th Percentile 60th to 80th Percentile 80th Percen-tile to 30 °°°°C 10 000 l to 33rd Percentile Select n files at random Select n files at random Select n files at random Select n files at random Select n files at random 33rd to 67th Percentile Select n files at random Select n files at random Select n files at random Select n files at random Select n files at random 67th Percentile to 50 000 l Select n files at random Select n files at random Select n files at random Select n files at random Select n files at random
9.3.3 Simulated tank leaks (constant) Leaks from tanks are simulated as a continuous loss of product from the tank at a constant leak rate. The figure in a record representing the volume of stored product is reduced by a value equivalent to the quantity of product that would be lost at the specified rate during the time period between the record and its predecessor. The simulated losses for all previous time periods are accumulated and the total subtracted from the figure representing stored volume. These accumulated losses are also carried forward through each delivery event such that the subtracted figure increases monotonous. Therefore, the volume figure, vi, of the ith record is replaced by vi', calculated according to equation (1): ()Rv
t - t
- v = 1j-ji1=jii∑′ (1) where R
= simulated leak rate;
tj
= time stamp of jth record;
tj-1 = time stamp of predecessor to jth record. Where tanks are connected via a siphon, the quantity of product corresponding to the leak over the specified time interval is divided by the number of tanks in the siphon arrangement and this quantity subtracted from the records for each of the tanks connected via the siphon. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 11 9.3.4 Simulated tank leaks (variable) Leaks from tanks are simulated as a continuous loss of product from the tank at a variable leak rate which reduces as the quantity of stored product is reduced. The figure in a record representing the volume of stored product is reduced by a value equivalent to the quantity of product which would be lost at a rate specified for the time period between the record and its predecessor. The records in a file are divided into sets, each of which comprises all the records between one delivery and the next. Successive records in a set therefore always exhibit a decrease in stored volume. Where there are n records in a set, and the stored volume of the jth record is vj, the leak rate rj for that record is found as a function of the nominal leak rate to be simulated R, according to equation (2): Rr vvn
= kn1=kjj∑ (2) Therefore, the volume figure, vi, of the ith record is replaced by vi', calculated according to equation (3): ()r t - t
- v = j1j-ji1=jii∑′v (3) The simulated losses for prior periods are accumulated and similarly subtracted from the figure representing stored volume. These accumulated losses are also carried forward through each delivery event such that the subtracted figure increases monotonous. Where tanks are connected via a siphon, the quantity of product corresponding to the leak over the specified time interval is divided by the number of tanks in the siphon arrangement and this quantity subtracted from the records for each of the tanks connected via the siphon. 9.3.5 Simulated pipe leaks (suction and pressurised draw-off) Leaks from draw-off pipes are simulated as a loss of product from the pipe at a constant leak rate but only while a dispenser is drawing fuel. Each data file is first processed to accumulate the total time that fuel is being drawn from the pipe. The total volume of product which would be lost over the duration of the file (T) at a constant leak rate, R, is calculated and divided by the total dispensing time to give a leak rate, R', during dispensing, see equation (4): ) ts - te (jjn1=j∑′T_
R = R (4) where tej = end time of the jth dispensing transaction;
tsj = start time of the jth dispensing transaction;
n = total number of dispensing transactions in the file;
T = elapsed time from start to end of file. The figure in a record representing the volume of stored product is reduced by a value equivalent to the quantity of product which would be lost at the rate R' during the time period between the record and its predecessor, but only when a dispenser was drawing fuel during that period. The simulated losses for all previous time periods are accumulated and the total subtracted from the figure representing stored volume in this and all subsequent records (including periods where no fuel is drawn from the tank). These accumulated losses are also carried forward over each delivery event such that the subtracted figure increases monotonous. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 12 Therefore, the volume figure, vi, of the ith record is replaced by vi', calculated according to equation (5): ()
ts - te
- v = jjm1=jii′′∑Rv (5) where m = number of dispensing transactions whose end time is earlier than the time stamp of the ith record. Where tanks are connected via a manifold arrangement, the quantity of product corresponding to the leak over the specified time interval is divided by the number of tanks connected to the manifold and this quantity subtracted from the records for each of the tanks so connected. 9.3.6 Induced leak rates – quantitative systems The selected sample of 45 files is sub-divided at random into four sets, one of 15 files and three of 10 files each. For each specified leak rate to be detected in accordance with Table 1, simulated leaks are induced in these sets on the following basis: 9.3.6.1 15 files: zero leak rate; 9.3.6.2 10 files: specified leak rate x 0,5; 9.3.6.3 10 files: specified leak rate; 9.3.6.4 10 files: specified leak rate x 1,5. To prevent the system under test rounding identified leak rates to these values, in each set of files the actual leak rates induced are further randomised in a band of ±20 % about the leak rates according to 9.3.6.1 to 9.3.6.4. Where both constant and variable leak rates are to be simulated, the same set of original files are used for both simulations at the same leak rate according to 9.3.6.1 to 9.3.6.4, to enable subsequent performance comparisons of the different types of leak. 9.3.7 Induced leak rates – qualitative systems The selected sample of 120 files is sub-divided at random into two sets, each of 60 files. For each specified leak rate to be detected, simulated leaks are induced in these sets as follows (no further randomisation is applied): 9.3.7.1 60 files: zero leak rate; 9.3.7.2 60 files: specified leak rate. SIST EN 13160-5:2004
EN 13160-5:2004 (E) 13 9.3.8 Test sequence For each test, the files from each set, as defined in 9.3.6 or 9.3.7 as appropriate, shall be submitted in turn to the system under test. The system shall process the files as though these represented data were collected during normal operation and shall produce an estimated leak rate for each file, or a pass/fail indication as appropriate, from data limited to that which would be acquired during the requisite detection period (as defined in 9.1.1.1, 9.1.1.2 or 9.1.1.3). Prior to each test, files shall be submitted to the system under test, which comprise data from the same tank but without any induced leak. These shall represent an elapsed time equal to the initialisation period specified by the manufacturer. The test sequence shall be according to Table 3 and as follows: Test 1: Simulated tank leak (constant) according to 9.1.1.1; Test 2: Simulated tank leak (constant) according to 9.1.1.2; Test 3: Simulated tank leak (constant) according to 9.1.1.3; Test 4: Simulated tank leak (variable) according to 9.1.1.1; Test 5: Simulated tank leak (variable) according to 9.1.1.2; Test 6: Simulated
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